... , automatic welding seam welding machine→ Mainly used in stainless steel, iron, aluminum, brass and other metal cylinder, puzzle straight seam welding.→ This machine adopts automatic ... workpiece length (mm): 300, 500, 1000, 15000, 2000→ Welding thickness: 0.3-8.0mm→ Welding speed: 30-800mm/min automatic dicrect seam welding machine